signInWithGoogle method
Implementation
Future<void> signInWithGoogle() async {
final GoogleSignInAccount? gUser = await GoogleSignIn().signIn();
// Get the GoogleSignInAuthentication
final GoogleSignInAuthentication? gAuth = await gUser?.authentication;
// Create a GoogleAuthProvider credential
final credential = GoogleAuthProvider.credential(
accessToken: gAuth?.accessToken,
idToken: gAuth?.idToken,
);
await _firebaseAuth.signInWithCredential(credential);
}